Mold construction



Feb 6, 1923., r 1,444,380 W. G. KIEFER.

MOLD CONSTRUCTION.

FILED 001.3.1922. 2 susars suzzr l.

JNVENTOFW WmGKLefeK AT ORNEY Feb. 6, 1923.

W. G. KIEFER.

MOLD CONSTRUCTION.

2 SHEETSSHEET 2.

HLED OCT. 3. 1922.

/)v VENTORJ W%1 G.Klefier ATTnRNEY Patented Feb. 6, i923.

WILLIAM G. KIEFER, OF BROOKLINE, MASSACHUSETTS.

MOLD CONSTRUCTION.

Application filed October 3, 1922. Serial No.

To all whom it may concern Be it known that l, WILLIAM G. i lrnrnn, a citizen of the United States, residing at Brookline, in the county of Norfolk and State of Massachusetts, have invented certain Improvements in Mold Constructions of which the following is a full, clear, and exact description.

This invention relates to mold construction and is herein shown as embodied in apparatus for securing together the interchangeable units of metal molds employed in the casting of concrete structures.

It is common practice to build up temporary molds for concrete by securing together, in the desired relation, a plurality of interchangeable units consisting of plates having marginal stiffening flanges. On a straight wall, it is essential that the flanges of adjacent plates be held together rigidly in exact registration to hold the plates flush with one another so that the wall will be per- :tectly straight and smooth. To have a straight corner, the plates must meet accurately in a straight line and be properly braced and secured.

.l t is an object of this invention to provide, in a mold construction, improved means by which the various units can he quickly, accurately and rigidly secured to gether in the desired relations; the features and advantages will be apparent from the following specification considered with the accompanying drawings in whichig. 1 is a perspective view of a portion of a mold showing the securing devices;

Fig. 2 is a perspective view of one of a pairof brackets used at a corner.

Figs. 3. and 4- are detail views of an improved securing device used on a straight wall.

Fig. 5 is an enlarged section of the mold showing the corner construction and Fig. 6 is a front view of Fig. 5 showing the brackets in course of becoming interlocked.

A plurality of interchangeable n old units 8, 10, 12, 1d, 18, 18 all of which may be alike are illustrated in Fig. l as forming two walls meeting at a corner. Each unit, such as 12, comprises a plate having marginal flanges around the four sides. The horizontal flanges 20 of each plate merge into the vertical fianges 22 by a curve 24 of small radius. Each of the flanges has a pair of slots 26 extending parallel to its edge and the slots of any two flanges are so placed as to register when the flanges are in registering face abutting relation as indicated.

l Vhere two plates such as- 10 and 12 meet as shown, the abutting flanges 22 are secured together by a member comprising a handle 28 and a substantially triangular enlargement The sides 32 and oil the enlarge ment 8O diverge from the handle towards the end 36 and the enlargement is bifurcated to form a pair of spaced lips 38 and 40 tapering towards the end 36 and designed to draw the abutting flanges 22 tightly together when the handle. is at right angles to the plates. @ne of the lips 40 is cut away at 42 at an acute angle to the handle and at the side of this lip, is el-t. integral with the lip 38. The pin has its longer cross dimension lying in align ment with the handle 28 andthis dimension is just qual to the width 01 the slot. When the handle is in the dotted line position of Fig. 3, the pin can be readily inserted in the slots 26 and, when the handle is moved to the full line position, the pin 44 causes the flanges 22 to come into alignment and the tapered lips draw the flanges tightly together. This member is in locking position when its handle stands away from the wall and is therefore adapted for use on a ceiling or overhead wall, its own Weight tending to hold it from any accidental swingii'lg which might cause it to drop and injure a workman passing beneath.

At the corner of a mold formed for eX- ample by a pair of plates 12, 16 in the same plane meeting a second pair of plates 14, 18 in a plane at an angle to the first, an angle iron having flanges 50 and 52 is extended along the corner formed by the flanges 22 on the plates. A pair of interchangeable, interlocking brackets 54 and '56 then lock the flanges of the angle iron to the flanges of the two pairs of plates. Each bracket comprises twosets or pairs of wings 58, and 32, 64-; the wings tapered to draw the embraced flanges tightly together in registering, face abutting relation. To prevent the pressure of the plastic material against the flanges plates from loosening the brackets from the angle iron, the brackets are constructed to interlock. As shown, each has an extension 66 at right angles to the wings, said extension being notched as at 68 thereby leaving a halved portion 72 portion 70. The brackets.

a an oblong pin joined to a hook as assembled, have their extensions crossing,

tering with the halved portion gle iron. Although they a downwardly opening notch on one regis- 72 on the other.

It should be noted that the upper and lower sets of wings are spaced enough to straddle the curved portions 24; of the flanges of the plates, there being a small amount of lost motion permitted so that the brackets can be assembled by two right angle movements of one bracket. For instance, assume that the bracket 56 is applied as shown in 1 with its upper wing 58 resting on the curved portion 24 at the corner of plate l t, The bracket 54 is first moved to approximately the Fig. 6 position, the halved portipn T2 on its extension 66 riding on the top e f-the hook portion of the other bracket 56. Second, the bracket 54: is moved or hammered downwardly, the halved portion 7 2 of one extension entering the slot 68 in the other. Fig. 6 shows this movement partly accomplished, the bracket 54 being movable downwardly still further to complete the interlocking movement which is arrested when the wing 62 meets the curved portion 2.4: on the plate 12.

By the above described construction, a strong, easily formed corner is produced, needing no nuts nor bolts. It is within the province of the invention to use these brackets (or similar ones with narrower spaces between the wings) with or without the anflnd their preferred use in the place shown, they can also be applied in interlocking pairs at the middle of the plates and singly they are adapted to hold flanges at the junction of tour plates in the same plane such as at the junction of plates 8, 10, 12, 16, etc. The terms hori zontal and vertical have been applied to the flangesQO and 22 but these terms are used merely for convenience of identification as it is apparent that the plates can lie in any desired planes and that the corners of the mold may be variously arranged.

Although the invention has been described by reference to a particular construction, it should be understood that the invention is not necessarily limited to the particular construction illustrated.

What I claim and ters Patent is:

1. In apparatus of the class described, a device for securing flanges which meet at an angle comprising a pair-of brackets, each secured to one of the flanges, said brackets having extensions meeting at an angle and arranged to interlock to hold the brackets together.

2. In apparatus of the class described, a device for securing flanges which meet at an angle comprising a pair of brackets, each secured to one of the flanges, said brackets desire to secure by Lethaving extensions, one extension having an upwardly facing notch to embrace the second extension and the second extension having a downwardly facing notch to embrace the first extension.

In a mold construction, means for securing together two pairs of plates having mar ginal flanges, each pair of plates lying in a plane at an angle to the other pair to form a corner of a mold, comprising a pair of brackets, each having two sets of wings for embracing the flanges ona pair of plates, and extensions on each bracket meeting at an angle and having interlocking portions.

4:. In a mold ronstruction, means for securing flanges which meet at an angle (10m: prising a pair of brackets, each having spaced wings to embrace one of the flanges, said brackets having extensions arranged to interlock.

5. In a mold construction, means for securing flanged plates meeting ata corner to a corner angle iron comprising a pair of brackets, each having wings embracing the flange on one of the plates and one flange or the angle iron to hold said members from separating, and interlocking portions on the brackets to hold said brackets together.

6. In a mold construction, means for se: curing together two pairs of plates having marginal flanges, each pair of plates lying in a plane at an angle to the other pair to form a corner for a mold, comprising a pair of brackets, each having two sets 0t spaced wings for embracing the flanges on a pair oil? plates, the sets oi? spaced wings also being spaced to straddle the flanges between the individual plates of each pair to hold the brackets from sliding, and interlocking extensions on the brackets to hold the brackets together.

7. In a mold construction having a plurality of interchangeable plates with marginal flanges, one pair of plates lying in the same plane with the horizontal flanges lying in face abutting relation, a second pair of plates lying in a plane at an angle to the first plane to form corner of a mold and having their horizontal flanges lying in face abutting relation, an angle iron having its flanges in face. abutting relation to the vertical flanges of the plates at the corner, a bracket having spaced wings embracing one of the flanges or the angle iron and the vertical flanges of the first pair o'l plates. a second bracket having wings embracingthe other flange of the angle iron and the vertica-l flanges of the second pair of plates, and interlocking extensions on the brackets.

In testimony whereof I have signed my name to this specification. u

@WILLI AM G. KIEFER. 

